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MODEL LD - LARGE SERIAL SLAVE DISPLAY
GENERAL DESCRIPTION
The Large Serial Slave Display is a versatile display that accepts serial ASCII
data from a host device and displays the received characters. The displayable
data includes numeric, 7-segment alphabetic and certain punctuation characters.
The 6-digit displays are available in either 2.25" or 4" high red LED digits
with adjustable display intensity. The 2.25" high models are readable up to 130
feet. The 4" high models are readable up to 180 feet. Both versions are
constructed of a NEMA 4X/IP65 enclosure in light weight aluminum.
The Serial Slave has two internal display buffers, allowing two separate
display values or messages to be viewed. The main (primary) display typically
shows dynamic data (count, rate, process, etc.), usually received directly from
another meter. The secondary display typically shows a fixed message or value,
such as a system or machine identifier, or a target production value. The main
and secondary displays can be toggled either manually or automatically at a user
selected toggle speed. Both displays are retained in memory when power is
removed from the unit.
For single meter remote display applications, the Serial Slave can be
connected directly to a Red Lion (or compatible) meter with RS232 or RS485
serial communications. The slave can display the meter value on its main display
without requiring a PC or other serial interface.
Multiple slaves are connected using an RS485 serial bus. If unique meter
addresses are assigned, specific data can be displayed by a single slave on the
bus. When multiple slaves are assigned the same address, common data can be
displayed by multiple units in different locations.
The serial interface is plug jumper selectable for RS232 or RS485
connections. Serial communications parameters are fully programmable, with
baud rates up to 38.4Kbps. Special command characters allow display selection
and display intensity adjustment through the serial input. In addition to the serial
input, a programmable User Input is provided to perform a variety of meter
functions.
CAUTION: Risk of Danger.
Read complete instructions prior to
installation and operation of the unit.
DIMENSIONS In inches (mm)
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com
CAUTION: Risk of electric shock.
1
2.25" or 4" HIGH RED LED DIGITS
DISPLAYS UP TO 6 DIGITS OF SERIAL ASCII DATA
DUAL DISPLAY BUFFER ALLOWS ALTERNATING DISPLAYS
SELECTABLE RS232 OR RS485 SERIAL INTERFACE
CONNECTS DIRECTLY TO RED LION PRODUCTS WITH SERIAL
PROGRAMMABLE USER INPUT
AC OR DC POWERED
ALUMINUM NEMA 4X/IP65 CASE CONSTRUCTION
SAFETY SUMMARY
All safety regulations, local codes and instructions that appear in this and
corresponding literature, or on equipment, must be observed to ensure personal
safety and to prevent damage to either the instrument or equipment connected to
it. If equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
The protective conductor terminal is bonded to conductive
parts of the equipment for safety purposes and must be
connected to an external protective earthing system.
SPECIFICATIONS
1. DISPLAY: 6-digit 2.25" (57 mm) or 4" (101 mm) adjustable intensity Red LED
2. POWER REQUIREMENTS:
AC Power:
AC Input: 85 to 250 VAC 50/60 Hz, 14 VA
DC Out: 11 to 16 VDC @ 50 mA
DC Power:
DC Input: 11 to 16 VDC @ 400 mA max, 7 W
3. SERIAL INPUT: (Jumper Selectable RS232 or RS485):
RS485 SERIAL COMMUNICATIONS
Type: Multi-point balanced interface (non-isolated)
Baud Rate: 300 to 38400
Data Format: 7/8 bits; odd, even, or no parity
Bus Address: 0 to 99; max 32 meters per line
RS232 SERIAL COMMUNICATIONS
Type: Half duplex (non-isolated)
Baud Rate: 300 to 38400
Data Format: 7/8 bits; odd, even, or no parity
4. USER INPUT (Programmable Function Input):
Active low logic, internal 7.8 KΩ pull-up resistor to +12V.
Trigger levels: V
= 1.0 V max; V
IL
Response time: 5 msec typ; 100 msec debounce (activation & release)
LD2SS6P0 16 (406.4)
LD4SS6P0 26 (660.4) 7.875 (200)
Bulletin No. LDSS-X
Drawing No. LP0703
Effective 6/07
= 2.4 V min; V
= 28 VDC
IH
MAX
PART
X (Length)
Y (Height)
NUMBER
4 (101.6)
12 (304.8)
22 (558.8)
Z (Center)
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Related Manuals for red lion LD Series
Summary of Contents for red lion LD Series
- Page 1 For single meter remote display applications, the Serial Slave can be AC Input: 85 to 250 VAC 50/60 Hz, 14 VA connected directly to a Red Lion (or compatible) meter with RS232 or RS485 DC Out: 11 to 16 VDC @ 50 mA serial communications.
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Page 2: Ordering Information
7. CONNECTIONS: 5. MEMORY: Nonvolatile E PROM retains all programming parameters, main Internal removable terminal blocks used for power and signal wiring. and secondary displays when power is removed. Remove end plates with ¼" nut driver. 6. CERTIFICATIONS AND COMPLIANCES: For LD2 and LD4 versions, all wiring is on the right side of the unit. -
Page 3: Wiring Overview
4. Signal or Control cables within an enclosure should be routed as far as possible 6. Long cable runs are more susceptible to EMI pickup than short cable runs. from contactors, control relays, transformers, and other noisy components. Therefore, keep cable runs as short as possible. 7. -
Page 4: Serial Wiring
2.3 SERIAL WIRING Equipment (DCE) receives data on the TXD line and transmits data on the RXD Serial communications is jumper selectable for RS485 or RS232. From the line. The LD emulates a DTE. If the other device connected to the meter also factory, the unit is defaulted to RS485 communications. -
Page 5: Programming Menu
4.0 P ROGRAMMING THE ETER PROGRAMMING MENU PROGRAMMING MODE ENTRY (PAR KEY) PROGRAMMING MODE EXIT (PAR KEY) It is recommended all programming changes be made off line, or before The Programming Mode is exited by pressing the key with installation. The meter normally operates in the Display Mode. No parameters displayed. - Page 6 PARITY BIT USER INPUT FUNCTION This parameter only appears when the Data Bit parameter is set to 7-bit. Set the parity bit to match that of the host device. If parity is set to , an additional DISPLAY MODE DESCRIPTION stop bit is used to force the frame size to 10 bits.
- Page 7 However, if an <*> or <$> is received, the slave will empty and reset its internal character buffer without processing the string. These characters are used as valid command terminators for serial commands sent to other Red Lion meters. Since these commands are not applicable to the Serial Slave, the slave discards the command and prepares its character buffer for a new data string.
- Page 8 The Company disclaims all liability for any affirmation, promise or representation with respect to the products. The customer agrees to hold Red Lion Controls harmless from, defend, and indemnify RLC against damages, claims, and expenses arising out of subsequent sales of RLC products or products...